Condensation and mould is not possible in a passive house. New Zealand has one of the highest rates in the world of asthma, affecting one in four New Zealanders; one of the highest rates of excess winter mortality, where 1800 more New Zealanders die every winter than in other seasons; one of the highest rates of rheumatic fever and one of the highest rates of hospitalisation caused by staphylococcus infections. Living in a passive house will ensure a stable temperature year round and an environment free from condensation and mould. Passive house is the only way to ensure that condensation or mould will never form in your house and is the only way to be sure that the internal temperature will remain within a healthy range. This can be guaranteed because of the rigorous calculations that accurately model the energy flow in the house in all seasons.

High Air Quality Modern houses are more airtight than older houses. This means that there is less fresh air in the house and air quality is compromised. Almost all building materials in New Zealand contain some toxic components and indoor air quality is significantly lower than outdoor air quality. A well balanced ventilation system ensures an abundance of fresh air. The filtered air is also of a significantly higher quality than the outdoor air. Any pollutants from smoke or car exhaust are removed. Natural chemicals that cause allergies such as pollens are also removed. This means that a passive house is part of the solution for many health issues related to air quality. You will not find a cleaner air environment either indoors or outdoors. The passive house process is unique in the rigorous nature of the calculations that ensure just the right amount of fresh air to every room at the right temperature and the use of only the highest quality ventilation systems.